You will need a good 30 amp rated double pole, double throw momentary rocker switch; the same as is used for the front landing jacks on a fifth wheel. The power and ground go on the end terminals of the switch with cross over conductors that switch the polarity to the opposite side at the other end of the switch so it looks like an X and the middle terminals are connected to the motor. When one side of the toggle is depressed the motor gets one polarity and when the other side of the toggle is depressed the voltage polarity is reversed. Good luck and keep us posted.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7